<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name" />
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number
          v-model="teacher.sort"
          controls-position="right"
          min="0"
        />
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师" />
          <el-option :value="2" label="首席讲师" />
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" />
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea" />
      </el-form-item>

      <el-form-item>
        <el-button
          :disabled="saveBtnDisabled"
          type="primary"
          @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacherApi from '@/api/edu/teacher'

export default {
  data() {
    return {
      teacher: {
        name: '',
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: '',
        saveBtnDisabled: false
      }
    }
  },

  // 监听
  watch: {
    $route(to, from) {
      this.init()
    }
  },

  created() {
    this.init()
  },

  methods: {
    init() {
      // 判断路径中是否有 id 值
      if (this.$route.params && this.$route.params.id) {
        // 从路径获取 id 值
        const id = this.$route.params.id
        // 调用根据 id 查询的方法
        this.getInfo(id)
      } else {
        this.teacher = {}
      }
    },

    // 根据讲师 id 查询
    getInfo(id) {
      teacherApi.getTeacherInfo(id).then(response => {
        this.teacher = response.data.teacher
      })
    },

    saveOrUpdate() {
      // 判断修改还是添加
      if (!this.teacher.id) {
        this.saveTeacher()
      } else {
        this.updateTeacherInfo()
      }
    },

    saveTeacher() {
      teacherApi.addTeacher(this.teacher).then(() => {
        // 提示信息
        this.$message({
          type: 'success',
          message: '添加成功!'
        })
        // 回到列表页面
        this.$router.push({ path: '/teacher/table' })
      })
    },

    updateTeacherInfo() {
      teacherApi.updateTeacher(this.teacher).then(() => {
        // 提示信息
        this.$message({
          type: 'success',
          message: '修改成功!'
        })
        // 回到列表页面
        this.$router.push({ path: '/teacher/table' })
      })
    }
  }
}
</script>
